Reliance Worldwide Corporation (UK) Ltd are the exclusive distributors of Aquasystem® expansion vessels in the UK. Our range incorporates an extensive choice of sizes and connection formats to suit most uses. The range of expansions vessels can be used for heating systems and potable water, together with special application vessels for solar systems.
Aquasystem pressure vessels are manufactured to comply with UK water regulations and are tested and certified by WRAS. All Aquasystem pressure vessels are supplied with a replaceable membrane, which separates the water and air, to prevent contamination of the water system, corrosion of the pressure vessel or loss of pressure in the water system.
The Aquasystem range of expansion vessels are available from 2 to 5000 litre capacity and are designed with replaceable membranes which allows the vessel to be serviced in situ and prevents any water contact with the steel shell to prevent internal corrosion.
A pre-charge valve for topping up air pressure is included.